Add RedshiftScheduledAction resource

[MikeSchouw]

Adding RedshiftScheduledAction resources.

Scan complete: 2 total, 2 nukeable, 0 filtered.

Do you really want to nuke these resources on the account with the ID xxx and the alias 'xxx'?
Waiting 15s before continuing.
eu-central-1 - RedshiftScheduledAction - [scheduledActionName: "pause-main"] - triggered remove
eu-central-1 - RedshiftScheduledAction - [scheduledActionName: "resume-main"] - triggered remove

Removal requested: 2 waiting, 0 failed, 0 skipped, 0 finished

eu-central-1 - RedshiftScheduledAction - [scheduledActionName: "pause-main"] - waiting
eu-central-1 - RedshiftScheduledAction - [scheduledActionName: "resume-main"] - waiting

Removal requested: 2 waiting, 0 failed, 0 skipped, 0 finished

eu-central-1 - RedshiftScheduledAction - [scheduledActionName: "pause-main"] - removed
eu-central-1 - RedshiftScheduledAction - [scheduledActionName: "resume-main"] - removed

Removal requested: 0 waiting, 0 failed, 0 skipped, 2 finished

Nuke complete: 0 failed, 0 skipped, 2 finished.

This closes #1048